Another "intelligence" test
Along the lines of "24 H in a D" means "24 hours in a day".
here
Note: spelling and grammar count - some people may be in trouble! The boxes change to green when you get the answer exactly right, but there is no other key so cheating is difficult (not that you'd ever contemplate that, of course).
I managed to get 30 right - missed 6, 28 and 31. A couple were lucky guesses. If anyone gets the ones I missed, please let me know so I can sleep tonight.